公开(公告)号：DE2359646A1

公开(公告)日：1974-07-04

申请号：DE2359646

申请日：1973-11-30

Applicant: IBM

Inventor： LUDLOW PETER J ,  TAI EUGENIO

IPC: H03F3/16 ,  H03F1/30 ,  H03F3/34 ,  H03F3/345 ,  H03K3/353 ,  H03K17/06 ,  H03K19/0175 ,  H03K19/094 ,  H03K5/02 ,  G11C7/06

Abstract: A bootstrap FET driver amplifier having a precharged relatively higher gate voltage and a relatively lower drain voltage obtained from a common power source. The gate voltage is derived from recurrent pulses produced by an on-chip FET free-running multi-vibrator and a voltage multiplier circuit powered from said power source. The pulse width of the recurrent pulses varies as an inverse function of the transconductance of the on-chip FETs and as a direct function of the threshold voltage of the on-chip FETs. The pulse width controls the charging time of a voltage booster capacitor in the voltage multiplier circuit whereby the amplitude of the boosted voltage is a direct function of the pulse width. The boosted voltage is applied to the gate of the bootstrap FET driver amplifier.